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From Mark Ragan

I very much enjoyed your “Complete Scientific History of the Universe” (28 October). I had not realised that Charles Bonnet (1720-1793) coined the term evolution a full 20 years before his own birth!

Correction: The article “Placental protein makes parasites feel at home” (Science 16 December) should have mentioned Patrick Duffy, who contributed equally with Michal Fried to the research described. The US Army Medical Research Unit is in Kisumu, Kenya, not in Nairobi.

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